I was thteatened by a coworker at work. She was very angry yelling accusations towards me while pointing a butcher knife within 3 feet of me. The previous week I was off and she made it known to 2 store assistant managers and a department head that she was looking for me. None of them did a thing to prevent this assault. Also my employer and coworkers know she has a very violent background. Several arrests and incarcerations some of which were assault with a deadly weapon and domestic violence. My manager talked to her she admitted to the assault and she assured him it wouldn't happen again. In fear of my safety I have resigned. No one seems to want to take any responsibility. What should I do?? I'm emoitionally a mess!